Describir: What is an "Altered state"?

 __   __    ______               ___      _____     _____     ______  
 \ \\/ //  /_   _//     ___     / _ \\   /  ___||  |  ___||  /_   _// 
  \   //    -| ||-     /   ||  | / \ || | // __    | ||__    `-| |,-  
  / . \\    _| ||_    | [] ||  | \_/ || | \\_\ ||  | ||__      | ||   
 /_//\_\\  /_____//    \__ ||   \___//   \____//   |_____||    |_||   
 `-`  --`  `-----`      -|_||   `---`     `---`    `-----`     `-`'   
                         `-`                                          
  _____   
 |  ___|| 
 | ||__   
 | ||__   
 |_____|| 
 `-----`